Digital food scale will not turn

Try an Android Hard Reset, but this unit appears to be an Amazon / eBay special from China, so the usual answer is to just buy another. Power down. Press and hold volume up and Power button. It is worth a try. Or phone them up in China.

https://www.google.com/search?q=mibao+M500

Even the box says 'Dingital Music Player'. They can't even spell Digital. iPods are brand leader for a reason.
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hi Sharon.
this link might help you out but not sure.
Thinner scale just keeps flashing 50 0 KG Google Search

To reset the BFM144DQ3-99 scale, you can try the following steps:

1. Remove the batteries from the scale.
2. Press and hold the power button for 10 seconds.
3. Release the power button and wait for 10 seconds.
4. Reinsert the batteries.
5. Press the power button to turn on the scale.

If the scale still does not reset, you can try contacting the manufacturer for assistance or searching online for a copy of the user manual.

The process for recalibrating a scale can vary depending on the specific model. However, a common method for resetting a digital scale is to first turn it off, then press and hold the "tare" or "calibration" button (if available) while turning it back on. Keep holding the button until the display shows "0" or "CAL" and then release the button.
If this does not work, consult the user manual for your scale or contact the manufacturer for specific instructions.

Try recalibrating it by turning it on while holding the "tare" or "mode" button. It should show a raw data from the sensor then. Press the tare button again and it should calibrate the empty weight. Then it will show a specific weight you should put on, usually 100g. It should automatically finish calibration now. Hope this helps. The words before calibration on my scale was OUt2

1. First, try recalibrating the scale with nothing on it.
2. If there is a reset button on the device, press it.
3. Try replacing the battery.
4. If it still acts up, it's probably time to get a new scale.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

I'm having the same problem. I hope someone has the solution.

Reset it!

Turn off the scale. Press and hold the MODE button and turn the scale on. Release the MODE button you will see the scale's internal count.
Press and hold the TARE button then press (don't hold) the MODE button you will see the full capacity is changing. Keep pressing the MODE while holding the TARE button until you see 100.00 on the screen. The reset is completed. You may need to recalibrate the scale after the reset.

Check your power cables properly and make sure it is attached. Check your power button, maybe you have pressed the wrong one.

The MPVR uses a rechargeable Li-Ion battery. It sounds lilke you've got a different model. It's hard to make any suggestions without knowing which camera you've got.